1.

A ball of mass m moving with velocity V, makes a head on elastic collision with a ball of the same mass moving with velocity 2V towards it. Taking direction of V as positive velocities of the two balls after collision are       [MP PMT 2002]

A.          \[-V\] and \[2V\]
B.                       \[2V\]and \[-V\]
C.          V and\[-2V\]
D.                       \[-2V\] and \[V\]
Answer» E.


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